Hosa ACD-477 Universal Power Adaptor with DC Output up to 12V Input: AC 115v 60Hz, Regulated Output: DC 3-4.5-6-7.5-9-12V, 1200mA max High Efficiency: More than 80% Six Adaptor Plugs: For use with most small home electronic devices Short Circuit Protection (SCP): Self-protection against short circuit. Please refer Instructional Video and the User Manual attached below for instructions and troubleshooting steps.